According to this website
http://www.abrail.co.uk/DandEdepots.htm the only Hibberd "Planet" loco ever to be used on B.R. was no.52 (11104) at West Hartlepool Creosote Depot. I wonder if it went to Doncaster Works for scrapping?
Is it pure coincidence that Doncaster Works was usually referred to by railwaymen as "THE PLANT" ?